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CHARLES GRAFTON mengen WAIsHrNGTon nrsfrnidfr@orfeoilunisiky Doon-BOLT.

Specification of Letters `Patent No, 126,518, datedflecember `2b,

y To all whom 'it concern:

Be it known that I, `CHARLES Gnerroiv Ilma, of Washington, in the `countyffof Vashington and District of Columbia, have invented a Mode of Locking Bolts, and `that the following is a full, clear, and exactdescription of the principle or characterwhlch distinguishes it from all other things before known and of `the usual manner of making, modifying, and using the same, lreference being had to the accompanying drawings, of whichHw y i y Figure l represents a flat bolt locked by a loose handle having a rectilinear movement, and Figs. 2, 3, 4, 5, 6, 7, and 8 repre-V sent several modifications of bolts locked by loose handles having rotary movements.

My invention consists in certain improvements in bolt fastenings described and represented as follows. Letters Patent were granted to me on the fourteenth day `of July 1857, for locking bolts by means of a loose handle which had a rectilinear movement while in the act of fastening and` unfastening. In the present case the` loosehandle requires a rotary movement to effect the fastening. The loose handle (A, Fig.` l) with a rectilinear movement may be applied according to principles set forth in the above named patent, to bolts of a square or flat form as clearly shown in the drawing A Fig. l, but in order to apply the principle, of locking bolts by means of a loose` handle, to the sliding bolts with as little change as possible in the construction and operation of such bolts, I have invented the several modications exemplified in the several Figs. 2, 3, 4, 5, 6, 7 and 8 of the accompanying drawings.

In Fig. 2, I) is the bolt and c the loose handle, turning on the pivot d. The bolt is shown as locked and the loose handle c resting on the ledges e or projections of rthe guards, prevents the bolt from being slipped or pushed back. The handle is shown by dotted lines c in that position in which the bolt is to be moved back and fort-h. This handle acts to some extent as a lever in moving the bolt, the guards f, f, serving as fulcra.

.Fig 3 shows the use of this bolt for an upright bolt and when used at the top of a high door, it is worked by means of a chain g running over a pulley or pin h. `The chain being attached to the handle just below the pivot (Z, draws the loose handle c in place,

as it draws the bolt up. The chain being f of the bolt. The gainofleverage inthis".`

pressed i against of y handle throws ,itV uponthe `inclined `part of the guard j.andtheboltithenfdesceii s:

by its own weight, or if bolt bindsfrom `6()` u displacement, or other cause, another chain may be attachedtorthesame ,part ofi l. "l

loose handle` as `,chain.g@ anduhangdotvn therefrom, instead of] passing4 overllpullev ,7L

y and this chain-mayfbeused forgpullingth b bolt down.

which` the loose hanfleisapplied torsquare y y l orflatbolts. y ,y l y y Fig. 5 is a cross sectionthrough the handle. The handle c turns on its pivot all and ,y

is used like the ordinary; knob orhandle pushing the bolt back and forth;` A portionw` of the ordinary handle being cut outat y1 is the only substantial change in thecon-z struction of this handleto adapt tto the` y purpose of locking thebolt; When the ,bolt y is to be pushed in either direction` the loose handle c is turned so as to standacross the,l bolt or in a direction at right angles'qto its 80 axis, as it is shownin Fig.; 6; and the looseu handle is used in the same manner asl theI the reverse of the positionlshown `in Fig. 4 i

it acts favorably as lever in startingthe` i bolt, 1n` case 1t binds from any 1cause; its` l shorter arm c2 operatingagamst the guardj case is not great but the power of thethumb i and finger is applied to a greater `advantage i than it would be in an attempt to move the i y u 1 bolt by a directmovement offthefhandle. This class` of `bolts is generally used `for blinds or shutters and in positions where the l bolt is to be pushed to one side or the other by the hand when extended in front of the y body, which is anunfavorable position for]` 65 `1 the exertion of muscularforce, in suchfdirec-` I y tions. The most favorable exercise ofthe. 1

muscular power when the `hand is extended in front of the body, lis rotation of the:`

hand as in the act `of turning a keyonaulofy button. Proceedinggupon,thisprincipled` have made the catchpiece p of the form shown in Figs. G and` 7 sothat it makesa y ing or compression between the thumb and fore finger, Which is more favorable than the `direct movement of the Whole hand. Lastly to effect the purposes of locking and leverage by the loose handle especially in the case o`V very large and heavy bolts I use the modication shown in Fig'. 8, Where the handle o is in the form of a crank upon theaxle of which is fixed a pinion s which meshes into the rack t, this rack being on a part of the guard of the bolt. This bolt is moved back and forth by turning the crank o and is locked by the 'engagement of the paWl in the teeth of the pinion s.. When the bolt is to be pushed back or unbolted the paWl is to be raised from the pinion.

It Will be seen that a common principle of action obtains in all the above. modifica? tions, viz., the locking and leverage are ef. fected by loose handles turning on their axes and movin with the bolts. also that giving to the bolts other angular forms than square or flat or making them cylindrical or semicylindrical or giving to the bolt a curvilinear motion Would not change the character or principle of my invention.

Therefore What I claim and desire to secure by Letters Patent as my invention is- The locking of bolts when bolted or shut by means of rotary handles moving With the 3 bolts and operating substantially upon the principles hereinset forth.

oHAs. G. PAGE.

Witnesses:

WM. H. HARRIssoN, H. S. STEVENS.

It is obvious 25 

